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本厂接修了一辆伏尔加轿车,该车冷车时发动机工作正常。随着水温的升高逐渐出现行驶无力。抬油门熄火;当水温升至60℃以上时无怠速、着车非常困难。 开始认为化油器怠速装置工作不良或进气系统有漏气现象。将化油器检修后故障依旧,经查进气歧管垫和有关的真空管都完好。故障出现时测气缸压力,仅为0.2～0,3MPa,说明气缸密封不严。检查气门均无间隙,冷车气门间隙不足O.10mm。将气门间隙调至标准间隙(前后两气门0.40～0.45mm,其它为0.30～0.35mm),故障排除。原来是司机为了不让气门响而特意调小的。
The factory pick up a Volga sedan, the car is cold when the engine is working properly. As the water temperature gradually appear driving weakness. Lift the throttle to turn off; no idling when the water temperature rises above 60 ° C, the car is very difficult. I started to think that the carburetor idling device is not working well or the air intake system has the phenomenon of air leakage. After the carburetor maintenance of the fault remains intact, check the intake manifold pad and the vacuum tube are intact. When the fault occurs, measure the cylinder pressure, only 0.2 ~ 0, 3MPa, indicating that the cylinder seal is not strict. Check valve without gaps, cold car valve gap less than O.10mm. The valve clearance transferred to the standard gap (before and after the two valves 0.40 ~ 0.45mm, the other for 0.30 ~ 0.35mm), troubleshooting. The original is the driver in order to prevent the valve ring and deliberately transferred small.